Auto idle

Increase efficiency with automatic idling

In a situation where pump pressure is not needed due to low or no operations, it is important to reduce engine speed until pressure is needed again. Reducing the engine speed in idle situations increases the efficiency of the hydraulic system and thereby reducing fuel consumption and engine noise levels.

Although many auto idle applications are commonly using a mechanical switch, Danfoss recommends using an electronic switch.

Mechanical switches have many problems

Mechanical switches often leak causing warranty claims
The electrical contacts can burn out resulting in failure
The general accuracy is around +/- 5%
The set point can drift over time
Over and burst pressure limitation due to moving parts

Typical specifications

Switch point range: 40 bar
Pressure range: 0 – 60 bar
Temperature range: -40 – 125 °C
Accuracy: 2% FS

Features and benefits

Electronic pressure switches have 100% welded construction so no leakage possible
No electrical contacts to burn out
Highly accurate – better than 2% typical
No set point drift
Over and burst pressure advantage due to fully welded design
All the advantages from the “world” of transmitters in relation to vibration shock etc.
A more reliable auto idle system
Less wear outs of the switch due to no mechanical parts
Reduced warranty claims

Contact us

For further information, please contact us.